Electromagnetic device particularly useful as a vibrator for a fluid pump
First Claim
1. An electromagnetic device, comprising:
- a core of magnetically permeable material having a longitudinal axis, a central section coaxial with said longitudinal axis, an outer section spaced outwardly from said central section, and a bridging side section bridging the outer and central sections at one side of the core, the opposite side of the core being open;
a coil in the space between said central and outer sections of said core and spaced inwardly of the open side of the core such that the coil is completely recessed within the core, and the outer and central sections of the core define an extension extending laterally past the recessed coil;
a movable armature of magnetically permeable material facing and aligned with said extension in the core, said armature being movable towards and away from said coil and being formed with a central recess;
and a pair of springs on the opposite ends of said core and coaxial with the longitudinal axis of the core, said pair of spring mounting said armature for straight-line reciprocatory movements parallel to said longitudinal axis of the core;
said armature and its recess being configured and located such that during the movement of the armature towards and away from the coil;
(a) the recess receives said central section of the core;
(b) the outer surface of the armature defines a first working gap with the inner surface of the core outer section at said extension;
(c) and the inner surface of the armature at said recess defines a second working gap with the outer surface of the core central section at said extension.
1 Assignment
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Accused Products
Abstract
An electromagnetic device includes a core and a coil in the space between a central section and an outer section of the core and spaced inwardly of an open side of the core such that the coil is completely recessed within the core. An armature, facing and aligned with the recess in the core is being movable towards and away from the coil. A pair of springs on the opposite ends of the core, and coaxial with the longitudinal axis of the core, mount the armature for straight-line reciprocatory movements parallel to the longitudinal axis of the core such that during the movement of the armature: (a) a recess in the armature receives the central section of the core; (b) the outer surface of the armature defines a first working gap with the inner surface of the core outer section; (c) and the inner surface of the armature at the recess defines a second working gap with the outer surface of the core central section.
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Citations
20 Claims
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1. An electromagnetic device, comprising:
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a core of magnetically permeable material having a longitudinal axis, a central section coaxial with said longitudinal axis, an outer section spaced outwardly from said central section, and a bridging side section bridging the outer and central sections at one side of the core, the opposite side of the core being open;
a coil in the space between said central and outer sections of said core and spaced inwardly of the open side of the core such that the coil is completely recessed within the core, and the outer and central sections of the core define an extension extending laterally past the recessed coil;
a movable armature of magnetically permeable material facing and aligned with said extension in the core, said armature being movable towards and away from said coil and being formed with a central recess;
and a pair of springs on the opposite ends of said core and coaxial with the longitudinal axis of the core, said pair of spring mounting said armature for straight-line reciprocatory movements parallel to said longitudinal axis of the core;
said armature and its recess being configured and located such that during the movement of the armature towards and away from the coil;
(a) the recess receives said central section of the core;
(b) the outer surface of the armature defines a first working gap with the inner surface of the core outer section at said extension;
(c) and the inner surface of the armature at said recess defines a second working gap with the outer surface of the core central section at said extension. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An electromagnetic device, comprising:
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a core of magnetically permeable material having a longitudinal axis;
a coil fixedly mounted within said core and having a longitudinal axis coaxial with that of said core;
an armature mounted for straight-line reciprocatory movement within said core along said longitudinal axis of the core;
a pair of springs mounting said armature for straight-line reciprocatory movement, each of said springs being a flat spring made of an elastic sheet material of a circular disc shape and formed with a plurality of coaxial, circular arrays of closed, elongated curved slots to impart axial flexibility while providing radial stiffness;
and a piston coupled to said armature and movable within a chamber having a first one-way valve for inletting air into the chamber, and a second one-way valve for outletting air from the chamber.
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Specification